- Big Bore Kit
- Compatible Make
- Compatible Type
- Piston Bore
- Piston Material
- Piston Style
- Type
- Big Bore (43)
- Big Bore Kit (180)
- Big Bore Top End Kit (6)
- Block Cylinder (6)
- Complete Cylinder (33)
- Cylinder (22)
- Cylinder Barrel (72)
- Cylinder Block (12)
- Cylinder Kit (89)
- Cylinder Piston Kit (8)
- Cylinder Rebuild Kit (6)
- Engine Kit (6)
- Engine Rebuild Kit (218)
- For Linhai Lh300 (5)
- Piston (15)
- Piston Kit (110)
- Rebuild Engine Kit (6)
- Top End Kit (11)
- Top End Rebuild (5)
- Top End Rebuild Kit (45)
- Other (3365)
For Honda CBR300 CRF300 76mm Big Bore Cylinder Piston Gasket Kit
The OEM standard bore is 76.00mm - this 76mm kit maintains standard displacement. Precision dimensions: piston diameter 76.00mm (standard bore), piston rings 76mm set (2 compression rings + 1 oil ring), piston pin 15mm. The kit includes: 76mm cylinder block (aluminum alloy), 76mm piston (flat top/dish type, 10.7:1 stock compression), piston rings, wrist pin, circlips, and full top-end gasket set (cylinder head gasket, base gasket). For performance upgrades, 76.25mm (+0.25 oversize) high compression dome pistons (12.3:1 CR) and 78-79mm big bore kits (305cc) are available. Professional installation recommended for complete top-end rebuild - proper ring gap and torque specs required. Ideal for restoring lost compression, eliminating blow-by, reducing oil consumption, and performing complete top-end maintenance on 286cc single-cylinder engines. Perfect for sport riding, off-road adventure, and engine rebuilding.